Fire-damp detector.



H. FLEISSNER.

FIRE DAMP DETECTOR. APPLlcAloN FILED Nov. 2s. |915.

Patented Oct. 24, 1916.

HANS FLEISVSNER, 0F PRIBRAM, AUSTRIA-HUNGARY.

' Finn-Damp Dr.'.rncfroa.v

To oZZwwm 15mm/concern: `Be it known that I, I-IANs FLEissNnn, a subjectof the Emperor of Austria-Hungary, and residing at Pribram,Austria-Hungary, have invented new and useful Improvements in Fire-DampDetectors, Vof which the following is a specification.

My invention relates to the detection of fire-damp, its object being toprovide an appa-ratus which is able to indicate the presence offire-damp.

My novel lire-damp detector is based on the phenomenon of the singingflame.

If a flame is placed into a certain position within a hollow body openat two ends and adapted for the production of sound through oscillationof the air within the said body, a sound will be produced which ceaseson they flame being moved into another position. If the distance betweenthe first flame position in which the sound producing body sounded, andthe second position in which the sound production ceased is not toogreat the sounding will again set in when the air within the hollow bodyis intermixed with explosive gases; thus the sounding of the hollow bodyindicates the presence of explosive gases in the air. My novel fire-dampdetector is based on this principle, and may be so constructed that thesame can be used as a miners lamp. The flame in my detector is adaptedto be moved within the second chamber, and the apparatus can thereby beadjusted to detect even small proportions of mine-gas.

In the accompanying drawing I `have illustrated a preferred embodimentof my invention, in elevation, and partly in section.

Referring to the drawing, a is the container for the fuel and Z) theburner. The burner ZJ is provided witha toothed rack b which is engagedby a pinion c by means of which the burner can be raised or lowered. Theburner Z2 is incased in a glass tube cl which terminates at its lowerend slightly above the upper face of the container a and is fixedlymounted in a downward projecting extension 7 of a hollow globe or balle. At its head the hollow globe e carries the chimney g. The tube el isinca-sed in a larger glass tube h of the type usually employed in minerslamps. A mantle z' of wire-work extends from the upper end of the tube7L to the globe e and allows air to pass to the burner 'Io furthersafe-guard against Specification of Letters latent., l Patentd @613. 24k191,5 Application mea November 2e, 1915.1 serial No. 63,55?.`

fire-damp explosion, the chimney g is inclosed in a wire-work casing 7c.Thel parts are supported in a frame Z in a manner well known forinstance, with miners lamps, a hook m being provided by means of whichthe lamp can be conveniently carried about.

My novel fire-damp detector is used as follows: The position of theburner is adjusted so that the flame produces a sound, whereupontheburner is moved until the sound ceases. If now explosive gases enter theinterior of the hollow body surrounding the flame, the sounding willstart anew. To detect very small proportions of mine-gas the flame maybe adjusted to sound weakly in pure air. When explosive gases mix withthe airA within the lamp, the sounding becomes stronger and a changeoccurs in the tone-color of the sound.

The hollow globe e is especially suited for the purpose of my lire-dampdetector. I-Iowever the hollow body, to answer certain requirements, maybe given a form that is essentially different from the form shown in thedrawing. For the effective operation p of the lamp a sufficient draft isa requisite;

the dimensions of the hollow body as well as the dimensions of the inletand outlet openings will have to be chosen accordingly.

To produce a flame, any suitable liquid gaseous or solid fuel may beemployed.

It is obvious that various modifications may be made as regards the formand disposition of the parts of my lire-damp detector, without therebyinvolving any departure from the spirit and scope of my invention.

I/Vhat I claim as my invention and desire to secure by Letters Patent ofthe United States, is:

yl. A fire-damp detector, comprising in combination, a fuel container, aburner, a hollow globe, a chimney on said globe, and

an extension on said hollow globe, said extension being disposed so asto inclose said burner, whereby the flame of said burner is adapted toproduce a sound within said eX- tension.

2. A lire-damp detector, comprising in combination, a fuel container, aburner in connection with said container, a tubular structuresurrounding said burner and extending above said burner, an enlargedportion in said tubular structure, an air admitting space at the lowerend of said tubular structure, and means for longitudinally adpositionand out of a sounding position.

3. A lire-damp detector, comprising 1n combination, a fuel container, aburner connected with said container, means for varying the position ofsaid burner relatively to said container, a tube surroundingV saidburner and extending above said burner. an enlarged portion in said tubeand intermediate its ends, an air admitting space at the lower end ofsaid tube, and means for rendering the detector safe against explosion.

4. A lire-damp detector miners lamp comprising a burner, a resonant tubesurrounding said burner and adapted to emit sound induced by the flameof the burner, means for adjusting one of said elements with relation tothe other to vary or silence the soundof the flame, an outer tubesurroundingand spaced from said resonant tube, a globe surmounting saidresonant tube, and a wire gauze mantel between said outer tube andglobe, said parts being operative to produce or increase a singing soundwhenever a lire-damp gas is admitted to the lalnp. 5'. VA fire-dampdetector miners lamp comprising a burner, a resonant tube surroundingsaid burner and adapted to emit sound induced by the flame of theburner, means for adjusting one of said elements with relation to theother to vary or silence the sound of the llame, an outer tubesurrounding and spaced from said resonant tube, a globe surmounting saidresonant tube, a wire gauze mantle between said outer tube and globe, achimney extending upward from the top of said globe, and a wire gauzecasing surrounding said chimney, said parts being operative to produceor increase a singing sound whenever a fire-damp gas is admitted to thelamp.

in testimony whereof I have hereunto aiiXed my signature.

Dn. HANS FLEISSNER.

Witnesses:

ANTON STECKE, FERDINAND SCHLTZER.

Copies o1 this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C."

